SIST EN 3008:2001

Overview

SIST EN 3008:2001 is a European standard developed by CEN that specifies the requirements for aerospace-grade bolts featuring a hexagon head, relieved shank, and long thread design. These bolts are manufactured from the heat-resisting base alloy NI-P100HT, commonly known as Inconel 718. This nickel-based superalloy ensures exceptional performance in demanding aerospace environments by maintaining mechanical strength and corrosion resistance at elevated temperatures. The standard classifies these bolts to withstand tensile strengths of 1275 MPa at ambient temperature and retain structural integrity up to 650 °C.

Key Topics

• Bolt Design

  • Hexagon head for optimal torque application
  • Relieved (reduced diameter) shank to minimize stress concentration
  • Long-threaded section for greater engagement and adjustability

• Material Specification

  • NI-P100HT (Inconel 718), a heat-resistant nickel-chromium alloy known for superior strength and oxidation resistance
  • Suitable for high-temperature aerospace environments

• Mechanical Properties

  • Classification at 1275 MPa tensile strength at room temperature
  • High-temperature performance certified up to 650 °C

• Quality and Testing

  • Conformance to strict mechanical and geometric tolerances
  • Testing procedures to verify strength, thread integrity, and temperature resistance

Applications

SIST EN 3008:2001 bolts are designed specifically for aerospace and aerospace-related industries requiring reliable fasteners that operate safely under extreme thermal and mechanical stress conditions. Typical applications include:

• Jet engine assemblies where components are exposed to high temperatures
• Structural fastening in aerospace airframes and systems requiring high strength and corrosion resistance
• High-performance aerospace machinery and equipment operating in harsh environments
• Spacecraft hardware exposed to fluctuating thermal loads

Using bolts compliant with EN 3008 ensures enhanced safety, durability, and performance in critical aerospace applications, reducing maintenance and failure risks.

Related Standards

• EN 3506 - Stainless steel fasteners for aerospace applications
• EN 12385 - Steel wire ropes applicable in load-bearing aerospace components
• ISO 898-1 - Mechanical properties of fasteners made of carbon steel and alloy steel
• AMS 5662 - Aerospace specifications for Inconel 718 bolts and fasteners
• ASTM F468 - Standard for heat-resistant alloy bolts

These related international and regional standards complement EN 3008 by covering additional materials, fastener types, and mechanical requirements for aerospace bolt applications.

Adhering to SIST EN 3008:2001 ensures aerospace manufacturers utilize high-quality, heat-resistant bolting solutions optimized for performance under severe operating conditions, meeting safety and reliability standards critical in the aerospace industry. Keywords: aerospace bolts, hexagon head bolts, Inconel 718 fasteners, heat-resistant bolts, EN 3008, aerospace fastener standards.